In Joe's work in radiochemotherapy, he uses iodine-131 (half-life 8.0 days) in the treatment
of thyroid conditions. If his...?
In Joe's work in radiochemotherapy, he uses iodine-131 (half-life 8.0 days) in the
treatment of thyroid conditions. If his sample for treatment has to maintain an activity of
4.85 x 10^16 decays per second, how much time does he have until he must resupply a
sample that begins with 30.0g?

Intro: a solid ball of radius rb has a uniform charge density ρ. part a: what is the magnitude of the electric field e(r) at a distance r> rb from the center of the ball? express your answer in terms of ρ, rb, r, and ϵ0. part b: what is the magnitude of the electric field e(r) at a distance r express your answer in terms of ρ, rb, r, and ϵ0. part c: let e(r) represent the electric field due to the charged ball throughout all of space. which of the following statements about the electric field are true? check all that apply. e(0) = 0 e(rb)=0 limr→∞e(r)=0 the maximum electric field occurs when r=0 the maximum electric field occurs when r=rb the maximum electric field occurs as r→∞.